Printing of the Jikji
The Jikji was printed with metal type at Heungdeoksa in Cheongju; it is the oldest extant book printed with movable metal type.

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Its full title is Baegun hwasang chorok buljo jikji simche yojeol, an anthology of the essentials of Seon compiled by the monk Baegun Gyeonghan. Its colophon states that it was "printed with cast type at Heungdeoksa outside Cheongju in the seventh month of 1377", some seventy years before Gutenberg’s 42-line Bible.
Only the second of its two volumes survives, in the Bibliothèque nationale de France. Collected by the French envoy Collin de Plancy in the late 19th century, it was identified as the world’s oldest metal-type book by the librarian Park Byeong-seon at the 1972 International Book Year exhibition. It became Memory of the World in 2001.